Connect The Wiring; Install The Ductwork; Attach The Grille - Broan 678 Installation Manual

INSTALL THE HOUSING
(continued)
Existing Construction
ADJUSTMENT SCREWS
5. To adjust vertical housing position: Loosen adjustment
screws on both sides of housing. Move housing up or down
until bottom edge of housing is flush with finished ceiling
material. Tighten screws securely.

INSTALL THE DUCTWORK

NOTE: The duct connector has a
counter-balanced damper flap. The
flap will be "open" approx. 1" when
duct connector is attached to hous-
ing. This design permits insulation
to be in direct contact with fan/light
housing per UL (Underwriters Labo-
ratories) standards. The slightest
backdraft, however, will close the
damper flap, preventing air from
entering unit or finished space.
1. Snap the damper/duct connector onto housing. Make sure
that tabs on the connector lock into slots in housing. Top of
damper/duct connector should be flush with top of housing.
NOTE: Make sure damper flap is in place inside of duct con-

nector. If it is not: Squeeze top and bottom of connector
‚
to snap flap back into place.
2. Connect 4" round duct to damper/duct connector and
extend duct to outside through a roof or wall cap. Check
damper to make sure that it opens freely. Tape all duct
connections to make them secure and air tight.
FLUSH
MODELS 678 • 679 • 680 • 679FL • 680FL

CONNECT THE WIRING

SCHEMATIC WIRING DIAGRAM
L I G H T
S W I T C H
V E N T
S W I T C H
B L K
L I N E W H T
I N
G R D
S W I T C H B O X
BLACK
WHITE
BLUE
DUAL CONTROL
(purchase separately)
SWITCH BOX
LIGHT
FAN
120 VAC
LINE IN
1. Wire unit following diagram above. Run electrical cable as
direct as possible to unit. Do not allow cable to touch sides
or top of unit after installation is complete.

ATTACH THE GRILLE

1. Slide light reflector into front of grille opening. Plug light
into WHITE receptacle. Place grille / reflector combination
over protruding screw, and fasten in place using acorn nut
provided. HAND TIGHTEN acorn nut 1/4 turn after it is
snug.
2. Install light bulb (not included). (See next page for type
and size for your model.) Insert one tab on light lens into
a slot in the grille / reflector combination. Squeeze other
tab slightly and snap into remaining slot.
Page 3
R E D B L U L I G H T
( W H I T E )
W H T
B L K B L K
V E N T
( B L A C K )
W H T
W H T
G R D G R N
U N I T
WHITE
RED
RECEPTACLE
(LIGHT)
GROUND
(green
or bare)
WIRING
PLATE
BLACK
RECEPTACLE
(FAN)